Add config option to remove spaces after commas

[Saithe6]

This is admittedly a pretty niche feature, but I like my code formatted without spaces after commas. Up till now I've been just not using rustfmt, but I know in the future as I work with more people formatting will become harder and harder to avoid. I really hate the look of spaces after commas; I think there's something wrong with me.

Example:

use std::{fs,time,mem}

fn example(arg1:u8,arg2:i32,arg3:&str) -> Result<u8,String>

[Manishearth]

I think this is niche enough that it's unlikely that we will support this. Typically config options are added when there are a lot of people who would use them, since they're expensive to maintain.

And currently most config options still being added are not ones that reverse existing formatting, they are ones that apply further formatting on top of that.

[Saithe6]

Understandable. i'm gonna poke around and see if I can implement this myself for my own personal use

[Saithe6]

also why did I think import was a thing??? I've been reading too much haskell